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Cloudy Pool Water

Probable Causes of Cloudy Pool Water and Simple Ways to Clear It

Due to improper chemical balance or debris in the swimming pool, the water may turn cloudy. Read this information to find its causes, and some helpful at-home solutions.
Gardenerdy Staff
Last Updated: Dec 11, 2018
Cloudy Water Causes
There may be various reasons why a pool would turn cloudy, but the most common cause is the chemical imbalance in your pool. This occurs only when you use chemicals to keep your pool clean.
If you take a quick pH test, you will find that perhaps there is a low chlorine, high pH level, not enough shocking in the pool, and/or high calcium hardness of water, all combined will give you the cloudy results.
Also, the presence of microscopic particles like bacteria, dirt, twigs, and debris can be the culprit. Apart from these basic causes, other factors that affect the clarity of the swimming pool are―
Swimming Pool Algae Problem
  • Algae growth in the pool
Putting chlorine puck into pool skimmer
  • Poor filtration; perhaps the filter is dirty or needs to be replaced
Pool closed
  • Inadequate pool circulation; need people to swim in the pool more often
Girl enjoying in indoor pool
  • People coming in pool with makeup, lotion, creams, and tanning oil on
Maintenance of the pumping system of a pool
  • Poor pool maintenance
Above the Swimming Pool
  • More swimmers than the pool sanitizer can handle
Indoor swimming pool
  • Pool remains in shade too often; can't kill bacteria
Dry Leaves on Swimming Pool
  • Adequate vacuuming and cleaning of pool not done
Ways to Clear the Water
White Hibiscus
Instead of spending hundreds of dollars for professional pool cleaning services, why not give some of the home remedies a quick try.
Remedy #1
Clean the pool pump filter and turn it on. Take a plastic bucket, pour ½ cup diatomaceous earth (available in pool supplies stores) and enough water to fill the bucket. Take the bucket close to the water inlet of the pump and turn the bucket over.
Make sure that the bucket doesn't close the gap between it and the side of the pool. This way, the pump won't be able to take out any water outside the pool. Once the diatomaceous earth is soaked inside the filter, you will see that it will trap all microscopic particles, if any.
Once the pool is clean, remove the pump, wash it again, and place it back inside. You can repeat the process for as long as it takes to bring the pool back to normal (depends on the size of the pool).
Remedy #2
If the diatomaceous earth can't remove all the particles from the filter, use aluminum sulfate. First you will check how many gallons of water is present in your pool. For every 10,000 gallons, use 8 oz. of aluminum sulfate.
As the chemical does its magic, you will see that the minute particles are getting clumped together and sinking at the bottom. After this, all there's left to do is vacuum your pool. Till the pool water is clear again, keep repeating the process.
We've all heard the proverb, "Prevention is better than cure". So why not follow that here as well, and keep the swimming pool clean in the first place. To do so, on a regular basis, you will have to empty out your pool, use a fiber brush, and start cleaning it.
After the water is filled back into the pool, always do a chemical test to check if everything is in order. Regular pool maintenance is much better than getting a wake-up call from the cloudy water. These maintenance and cleaning tips are not just so you don't have to pay more for the cleaning services, but also to keep you and your family safe.